肝浊音界消失多见于急性胃肠穿孔,反之,肝浊音界正常可排除急性胃肠穿孔。
参考答案:错
马克思在哲学上的伟大贡献是( )。
A.创立了唯物史观
B.建立了革命的人道主义
C.使哲学成为实证的科学
D.创立了辩证思维方法
Amy invests the following amounts at the end of Year l to Year4: Years 1 2 3 4 Amount1000 15002000 2500 ($) If it earns a 20% compounded interest rate, calculate the accumulated amount at the end of Year 4:
A.
B.
C.